Attachment plug



FIG. 1 is a front view of an attachment plug showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a cross-sectional view taken along line 7--7 of FIG. 1omitting internal structure; and,

FIG. 8 is a front perspective view thereof.

The ornamental design for an attachment plug, as shown and described.